The fuses are coded as follows.
Fuse/Relay
Location
Fuse Amp
Rating
Protected Circuits
1
30A
Not used (spare)
2
15A
Upfitter relay #4
3
30A
Not used (spare)
4
10A
Telescoping mirror switch, Interior
lights, Hood lamp
5
20A
Moon roof
6
5A
Driver seat module
7
7.5A
Driver seat switch, Driver lumbar
motor
8
10A
Power mirror switch
9
10A
Upfitter relay #3
10
10A
Run/accessory relay, Customer
access feed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
33
41
42
43
44
45
34
35
36
37
23
24
25
26
27
28
38
46
39
47
29
32
40
31
30
48
49
Roadside Emergencies
319
2011 F-250/350/450/550
(f23)
Owners Guide, 4th Printing
USA
(fus)